#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>

int main()
{
    pid_t id = fork();
    if(id == 0)
    {
        //child
        int count = 5;
        while(count)
        {
            printf("我是子进程，我正在运行：%d\n", count);
            sleep(1);
            count--;
        }
    }
    else
    {
        //parent
        while(1)
        {
            printf("我是父进程，正在运行...\n");
            sleep(1);
        }
    }
    return 0;
}
